Actions
Forum Thread Details
  • Replies 6 replies
  • Subscribers 402 subscribers
  • Views 622 views
  • Users 0 members are here
Related

Digital encoder

Former Member

I am trying to read the pwm signal from a digital encoder I got out of a mouse should I use PulseIn or analogRead. Please let me know the best way to do this. Thanks.

  • My money would be om pulseIn(), but you might need to monitor more than one pin to determine direction. See for example DASF006380.pdf

     

    I would probably not use pulseIn either. You need to count state changes, so busy monitoring or attachInterrupt() would match better.

  • in reply to chgus

    It is only one direction and in not farmiliar withattachInterrupt() could you please explain or is it in the .pdf?

  • in reply to Former Member

    // pin change interrupt example
    // attach wheel input on digital pin 2
    // not all pin's are able to interrupt on change, check documentation
    // these are for Arduino UNO
    #define interruptPin2 0
    #define interruptPin3 1
    volatile int wheelPos = 0;
    void setup()
    {
      Serial.begin(9600);
      attachInterrupt(interruptPin2,moved,CHANGE);
    }
    void loop()
    {
      Serial.print("Wheel position: ");
      Serial.println(wheelPos,DEC);
      // do other stuff
      delay(1000);
    }
    // everytime the wheel pin changes we call this function
    void moved()
    {
      // do simple and quick operations within the interrupt call
      wheelPos++;
    }

    The pdf was just a random example - i have no idea what component you are using

    This is how i would hook up the wheel decoder to test it:

     

    // pin change interrupt example

    // attach wheel input on digital pin 2

     

    // not all pin's are able to interrupt on change, check documentation

    // these are for Arduino UNO

    #define interruptPin2 0

    #define interruptPin3 1

     

    volatile int wheelPos = 0;

     

    void setup()

    {

      Serial.begin(9600);

      attachInterrupt(interruptPin2,moved,CHANGE);

    }

     

    void loop()

    {

      Serial.print("Wheel position: ");

      Serial.println(wheelPos,DEC);

      // do other stuff

      delay(1000);

    }

     

    // everytime the wheel pin changes we call this function

    void moved()

    {

      // do simple and quick operations within the interrupt call

      wheelPos++;

    }

     

  • Hi,

     

    Are you using a encoder of a Mouse...that's great. would you please share the details of project. Even i will love to give it a try.

     

    Thanks.

  • in reply to chgus

    Hi Christer, remember me from STK?

     

    Regards

     

    Andy

     

    Tel.+49-(0)6008-2580173 Haus/House

    Mobile.+49-(0)163-2887669